Nakano Note (Nakano wa Kangaeru noda) NK 4169 P/2019 LD2 (ATLAS)

The following improved orbital elements, by S. Nakano, are from 241 observations 2018 May 21 to 2020 July 31. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.52 arc second. The comet has passed 0.092 AU from Jupiter on 2017 Feb. 17 and will pass 0.12 AU from Jupiter on 2028 May 13 UT. See the previous orbits in CBET 4780 and NK 4118. Epoch = 2020 Apr. 21.0 TT T = 2020 Apr. 10.59195 +/- 0.01524 (m.e.) TT Peri. = 123.42369 +/- 0.00161 Node = 179.78316 +/- 0.00009 (2000.0) Inc. = 11.54636 +/- 0.00001 q = 4.5780289 +/- 0.0000111 AU e = 0.1358731 +/- 0.0000078 a = 5.2978665 +/- 0.0000494 AU n' = 0.08082627 +/- 0.00000114 P = 12.194 +/- 0.0001702 years (+/- 0.06 day) T = 2016 Nov. 29.93576 TT Epoch = 2016 Nov. 28.0 TT Peri. = 357.54868 e = 0.3601267 Node = 190.46313 (2000.0) a = 8.6720487 AU Inc. = 14.41480 n'= 0.03859415 q = 5.5490126 AU P = 25.538 years The predicted orbit for the 2045 return is as follows: T = 2045 June 25.33470 TT Epoch = 2045 June 29.0 TT Peri. = 1.58849 e = 0.2154138 Node = 157.78694 (2000.0) a = 6.7603052 AU Inc. = 10.49135 n'= 0.05607311 q = 5.3040419 AU P = 17.577 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 190710 850 1.0- 0.0 200529 T05 0.5- 0.1- 180521 F51 0.1+ 0.0 190710 850 0.5- 0.1+ 200530 850 0.0 0.1+ 180521 F51 0.1- 0.1+ 190710 850 0.1- 0.1- 200530 850 0.2- 0.0 180521 F51 0.1+ 0.0 190710 850 1.3- 1.6- 200531 T08 0.5- 0.3- 180521 F51 0.1- 0.2+ 190710 E23 0.7- 0.5- 200531 T08 0.1- 0.1- 180610 F51 0.0 0.1+ 190710 E23 0.2+ 0.2- 200531 T08 0.8+ 0.2- 180610 F51 0.1- 0.0 190710 E23 0.4+ 0.5- 200531 T08 0.6- 1.4- 180610 F51 0.1+ 0.1+ 190721 I41 0.1+ 0.3- 200531 T08 1.1- 0.9- 180610 F51 0.2+ 0.1+ 190721 I41 0.1+ 0.4- 200531 T08 0.5- 0.5- 2019/ 190721 I41 0.3+ 0.3- 200531 T08 0.2- 0.5- 190531 T05 0.3- 0.4+ 190721 I41 0.1- 0.6- 200531 T08 (4.4- 1.8-) 190531 T05 0.4- 0.1+ 190801 K88 0.2+ 0.4+ 200531 T08 1.1- 0.5- 190531 T05 0.9- 0.7- 190801 K88 0.2+ 0.3+ 200602 T05 (3.3- 0.9-) 190531 T05 0.1+ 0.1- 190820 K88 0.4+ 0.1+ 200602 T05 1.5- 0.6- 190610 T08 0.2- 0.2- 190820 K88 0.2+ 0.4+ 200602 T05 (3.1- 1.7-) 190610 T08 0.0 0.5- 190823 Q62 0.5+ 0.0 200602 Q11 0.8- 0.2- 190610 T08 0.2- 0.3- 190823 Q62 0.2+ 0.0 200602 Q11 1.0- 0.1- 190610 T08 0.1- 0.8- 190831 T05 0.0 0.6+ 200602 Q11 0.9- 0.5- 190610 F65 0.1- 0.0 190831 T05 0.3+ 0.3- 200604 T08 (3.5- 0.7-) 190610 F65 0.1+ 0.1- 190831 T05 0.3- 0.3- 200604 T08 1.0- 0.4- 190610 F65 0.1- 0.1- 190831 T05 0.5- 0.5- 200604 T08 0.2- 0.5- 190610 F65 0.1+ 0.1- 190904 T05 0.7- 0.6+ 200604 T08 0.6- 0.7- 190610 K88 0.4+ 0.7+ 190904 T05 0.1+ 0.2+ 200619 Q11 0.7- 0.1- 190610 K88 0.4+ 0.3+ 190904 T05 0.0 0.2- 200619 Q11 0.8- 0.1- 190610 K88 0.1- 0.4+ 190904 T05 0.1- 0.1+ 200619 Q11 0.7- 0.1- 190610 K88 0.1- 0.3+ 191008 T08 0.2- 0.3- 200625 L59 0.3- 0.7- 190610 K88 0.1- 0.5+ 191008 T08 0.1- 0.1- 200625 L59 (2.1- 1.1-) 190610 K88 0.1- 0.5+ 191008 T08 0.8- 1.0- 200625 L59 (2.0- 0.9-) 190611 691 0.1+ 0.2+ 191008 T08 1.0+ 0.1- 200628 349 1.0- 0.0 190611 691 0.2+ 0.1+ 191016 T08 0.3+ 0.6- 200628 349 1.5- 0.6- 190611 691 0.5- 0.1+ 191016 T08 0.0 0.2- 200702 T08 1.4- 1.1- 190611 E23 0.5- 0.3- 191016 T08 0.5+ 0.4- 200702 T08 0.6- 0.0 190611 E23 0.4- 0.8- 191016 T08 0.3+ 0.2- 200702 T08 1.2- 0.5- 190611 E23 0.2- 0.2- 2020/ 200702 T08 0.4- 0.2- 190611 L01 0.1+ 0.2+ 200331 Q62 0.0 0.1- 200710 T08 1.1- 0.1+ 190611 L01 0.3- 0.2+ 200331 Q62 0.1- 0.1- 200710 T08 0.8- 0.8- 190611 L01 0.5- 0.1+ 200331 Q62 0.3+ 0.2- 200710 T08 0.9- 0.9- 190611 L01 0.4- 0.3+ 200421 Q62 0.4- 0.2+ 200710 T08 (5.0- 1.2-) 190612 H06 0.2+ 0.0 200421 Q62 0.6- 0.0 200711 T05 0.2- 0.5- 190612 H06 0.1- 0.2- 200424 D29 1.2+ 1.1+ 200711 T05 0.4- 0.7- 190613 N55 0.9+ 0.5+ 200424 D29 0.1+ 0.3+ 200711 T05 0.6- 0.5- 190613 N55 0.3+ 0.5+ 200429 F52 0.4+ 0.2+ 200711 T05 0.3- 0.7- 190613 N55 0.7+ 0.3- 200429 F52 0.4+ 0.2+ 200713 C95 0.6- 0.7- 190613 595 0.7- 0.4- 200429 F52 0.4+ 0.2+ 200713 C95 0.7- 0.4- 190613 595 0.5+ 0.1- 200429 F52 0.5+ 0.2+ 200718 T08 1.0- 0.4- 190613 A17 0.0 0.1+ 200503 T08 1.0- 0.5- 200718 T08 1.6- 0.9- 190613 A17 0.7- 0.2+ 200503 T08 1.1- 0.4+ 200718 T08 0.5- 0.2- 190613 A17 0.0 0.5- 200503 T08 0.4- 0.4- 200718 T08 0.9- 0.1- 190614 850 0.2+ 1.0- 200503 T08 (2.9- 0.6-) 200720 T05 (3.5- 1.6-) 190614 850 0.4+ 0.6- 200519 T08 (2.9- 1.0-) 200720 T05 (2.1- 0.9-) 190614 850 0.2+ 0.3- 200519 T08 (4.4- 1.4-) 200720 T05 0.3- 0.3- 190614 850 0.2+ 0.1- 200519 T08 1.6- 0.2- 200720 Q68 0.3+ 0.1+ 190614 H21 0.4+ 0.4+ 200519 T08 (2.7- 1.3-) 200720 Q68 0.6- 0.3- 190614 850 0.4+ 0.5+ 200522 U83 0.3+ 0.4+ 200721 Q68 0.4- 0.0 190614 H21 0.4+ 0.3+ 200522 U83 0.7+ 0.1+ 200721 Q68 0.3+ 0.3- 190614 H21 0.2+ 0.4+ 200522 U83 0.3+ 0.0 200722 T08 0.9- 0.6- 190614 850 0.1+ 0.1- 200522 U83 0.7+ 0.4+ 200722 F52 0.5+ 0.4+ 190614 850 0.1+ 0.3- 200522 U83 0.2+ 0.2+ 200722 F52 0.4+ 0.3+ 190614 I52 0.5- 0.5- 200522 U83 0.1- 0.3+ 200722 F52 0.6+ 0.4+ 190614 I52 0.2+ 0.2+ 200522 U83 0.7+ 0.2+ 200722 T08 1.6- 0.6- 190614 I52 0.2+ 0.4+ 200523 T08 0.7+ 0.9- 200722 T08 0.8- 1.0- 190614 N55 0.6- 0.6+ 200523 T08 0.2+ 0.4+ 200722 F52 0.5+ 0.3+ 190614 N55 0.1- 0.3+ 200523 T08 1.2- 0.3- 200722 Q68 0.3- 0.0 190614 N55 0.3+ 0.4+ 200523 T08 0.8- 0.7- 200722 Q68 1.3- 0.4- 190615 G40 0.8+ 0.4- 200525 850 0.3+ 0.0 200723 323 0.4- 0.5+ 190615 G40 0.6+ 0.4- 200525 850 1.4- 0.3+ 200723 323 0.7- 0.3- 190620 T05 0.4- 0.4- 200525 850 0.8- 0.1+ 200723 Q68 0.1+ 0.2- 190620 T05 0.8- 0.9- 200525 T05 0.5+ 0.3- 200723 Q68 0.0 0.1- 190620 T05 0.6- 0.3- 200525 T05 0.3+ 0.0 200724 323 0.1+ 0.5+ 190620 T05 0.1- 1.0- 200525 T05 0.2- 0.1- 200724 323 0.3- 0.1+ 190626 Q62 0.3- 0.8- 200525 T05 (2.6- 1.1-) 200730 T08 1.9- 0.8- 190626 Q62 0.1- 0.1- 200526 F52 0.5+ 0.4+ 200730 T08 0.0 0.1- 190709 T08 0.1- 0.6- 200526 F52 0.4+ 0.0 200730 T08 0.2- 0.2- 190709 T08 0.9- 0.1- 200526 F52 0.7+ 0.5+ 200730 T08 0.2- 0.3- 190709 T08 0.2+ 0.6- 200527 215 1.0- 0.5- 200730 B96 0.6- 0.1+ 190709 T08 0.6+ 0.1- 200527 215 1.0- 0.5- 200730 B96 0.5- 0.2+ 190709 K88 0.3- 0.3+ 200527 215 0.8- 0.5- 200730 B96 0.9- 0.9- 190709 K88 0.4+ 0.2- 200527 U83 0.7- 0.0 200731 U83 0.2+ 0.0 190710 691 0.2- 0.2+ 200527 U83 1.0+ 0.3- 200731 U83 0.2+ 0.0 190710 691 0.2+ 0.1+ 200527 U83 0.8+ 0.5+ 200731 U83 0.0 0.0 190710 691 0.2+ 0.2+ 200527 U83 1.3- 1.6+ 200731 U83 0.1+ 0.0 190710 H21 0.2- 0.1- 200527 U83 1.0- 0.4+ 200731 U83 0.1+ 0.0 190710 H21 0.0 0.0 200527 P87 (8.1+ 0.2+) 200731 T05 0.2- 0.1+ 190710 H21 0.2- 0.2- 200527 P87 (7.1+ 0.5-) 200731 T05 0.2- 0.5- 190710 H21 0.0 0.0 200529 T05 1.1- 0.1- 200731 T05 0.6- 0.8- 190710 H21 0.0 0.2+ 200529 T05 0.4- 0.1+ 200731 T05 0.6- 0.1- 190710 850 0.5+ 0.1- 200529 T05 1.1- 0.1- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2020 Aug. 10

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